Has anyone purchased these? They are nice looking, but do they hold up? do they rust if scratched? And what kind of tires do you have on a 450ES. I am leaning toward the Mudrunner, but am also considering the Bi-Claws, Tri-Claws, Mudbugs and Vampires. I do about 80% trailriding, but woyld like something for the Mud that will work better than the stock tires, and would also like a little more ground clearence.